Hurricane Electric's IPv6 Tunnel Broker Forums

Title: AT&T 6rd support is long as live (a well hidden gem from at&t U-verse)
Post by: cnst on February 22, 2012, 08:42:34 PM

It would appear that AT&T has quietly added IPv6 support through 6rd for, seemingly, ALL of its customers without telling anyone (specifically, without telling any of the said customers).

All existing customers "are not affected" and don't know about any such support, since it's not actually supported by most CPE.

Details are here:

http://www.dslreports.com/forum/r26841639-

If you have Motorola NVG510, it's enabled by default (yes, that's how we, the customers, found out!). If you have 2Wire PoS, you can still play around and have it configured through your own equipment (and your equipment doesn't even has to have 6rd support, e.g. OS X and OpenBSD would do just fine for basic 6rd IPv6 connectivity).

Basically, 2602:300::/28 (6rdPrefix/6rdPrefixLen) and 12.83.49.81 (6rdBRIPv4Address, which is an anycast) is all you need to get it running, IPv4MaskLen is 0 (use the whole IPv4 address within IPv6, but notice that due to 6rdPrefixLen being /28 (instead of the more conventional /32) you have to do some one-nibble shifting, but the plus side is that you do get a /60 in the end). Plus 74.82.42.42 (ordns.he.net.), of course. :-) You can also try the standard dnsr{1,2}.sbcglobal.net, but they have a few problems: http://www.dslreports.com/forum/r26902814-IPv6-6rd-DNS-Cannot-resolve-IPv6-only-zones.

This 6rd from AT&T works great in the Bay Area, but I've heard that IPv4-wise, Los Angeles gets routed through San Jose, which is a bummer, since IPv6-wise, HE.net is routed through Los Angeles from San Jose AT&T, hence it would appear like people in LA would have to make three full roundtrips (LA -> SJ over IPv4 (1 round), then SJ -> LA -> SJ over IPv6 (2 rounds)) to reach HE's FMT IPv6 resources over this 6rd. :-)

What would be interesting to know are the locations of where 6rdBR's have been deployed. So far, it's known that LA uses the one in San Jose, so there doesn't appear to be a 6rdBR in LA. You can guesstimate the location of your 6rdBR by doing `traceroute 12.83.49.81` from your local AT&T network, or by doing a traceroute6 of your 6rd IPv6 address from a remote network, seeing the latency of the last hop of the 2602:300:c533:1510::/60 origin (which is, you've guessed it, the anycast 6rd prefix of the 6rdBR's 12.83.49.81). Your total latency for a given IPv6 resource over this 6rd would be the sum of these two latencies around the 6rdBR anycast (12.83.49.81 / 2602:300:c533:1510::/60).

Happy 6rd tunnelling!

P.S. I should warn you that this whole info is based solely on user-submitted "reverse-engineered" information. I should also warn you that if you ever decide to go to AT&T's corporate IPv6 web-site (the link for which is very short and memorable, but is intentionally omitted from this post such as to not waste people's time), that you will not find a single useful piece of information about anything whatsoever, and the time that you will lose you'll never get back! (-:

Title: Re: AT&T 6rd support is long as live (a well hidden gem from at&t U-verse)
Post by: Mangix on February 23, 2012, 09:28:12 PM

Title: Re: AT&T 6rd support is long as live (a well hidden gem from at&t U-verse)
Post by: broquea on February 23, 2012, 10:05:08 PM

Quote from: Mangix

I've noticed that http://www.google.com is now accessible through IPv6. That was not the case with my Tunnelbroker tunnel. Weird that Google would whitelist AT&T and not Hurricane Electric. at least i don't have to use http://ipv6.google.com anymore.

What? HE's tunnelbroker has been white-listed since Google started offering that service. Even your RDNSS is handing out the HE resolver that will provide AAAA records: